Vault-13

STEREOTAXIS INC STXS

COM NEW · Common Stock · CUSIP 85916J409 · ISIN US85916J4094

American medical robotics company

59 institutional holders -1 vs Q2 2023
37,934,53637.9m shares reported held*
46.9% of all shares outstanding*
$59.9mreported value*
5 new 17 added 18 reduced 5 sold out net sold ≈ $3.2m (-3.2m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 80.9m as of 2023-10-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.58. Options: 3 managers hold calls ($15.6k notional), 3 hold puts ($4.9k).

Trends to Q3 2023

Institutional holders

Managers reporting a position, each quarter

0255075Q3 22: 72Q4 22: 75Q1 23: 69Q2 23: 60Q3 23: 5959Q3 22Q4 22Q1 23Q2 23Q3 23
Numbers
QuarterHolders
Q3 202272
Q4 202275
Q1 202369
Q2 202360
Q3 202359

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
40040Q4 22: 32 bought or addedQ4 22: 24 cut or sold outQ4 22Q1 23: 25 bought or addedQ1 23: 32 cut or sold outQ1 23Q2 23: 25 bought or addedQ2 23: 30 cut or sold outQ2 23Q3 23: 22 bought or addedQ3 23: 23 cut or sold outQ3 23
Numbers
QuarterBought or addedCut or sold out
Q4 20223224
Q1 20232532
Q2 20232530
Q3 20232223

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$20k$40k$60k$80kQ4 22 calls: $50.6kQ4 22 puts: $2.5kQ4 22P/C 0.05Q1 23 calls: $19.3kQ1 23 puts: $63.8kQ1 23P/C 3.31Q2 23 calls: $47.7kQ2 23 puts: $40.8kQ2 23P/C 0.86Q3 23 calls: $15.6kQ3 23 puts: $4.9kQ3 23P/C 0.31
Numbers
QuarterCallsPutsP/C
Q4 2022$50.6k$2.5k0.05
Q1 2023$19.3k$63.8k3.31
Q2 2023$47.7k$40.8k0.86
Q3 2023$15.6k$4.9k0.31

Biggest buyers

Archon Capital Management LLC Added +223,790+223.8k
Lagoda Investment Management, L.P. Added +176,150+176.2k
Arbiter Partners Capital Management LLC Added +105,693+105.7k
GEODE CAPITAL MANAGEMENT, LLC Added +91,765+91.8k
SUSQUEHANNA INTERNATIONAL GROUP, LLP New +77,879+77.9k
NORTHERN TRUST CORP Added +56,833+56.8k
State of Wyoming Added +54,010+54.0k
AlphaCentric Advisors LLC Added +50,000+50.0k
Verition Fund Management LLC Added +37,277+37.3k
BlackRock Inc. Added +34,858+34.9k

Biggest sellers

Opaleye Management Inc. Sold out -3,074,995-3.1m
Redmile Group, LLC Reduced -608,106-608.1k
TWO SIGMA ADVISERS, LP Sold out -97,200-97.2k
GSA CAPITAL PARTNERS LLP Sold out -84,790-84.8k
MILLENNIUM MANAGEMENT LLC Reduced -79,664-79.7k
BRIDGEWAY CAPITAL MANAGEMENT, LLC Reduced -76,200-76.2k
TWO SIGMA INVESTMENTS, LP Sold out -44,328-44.3k
ESSEX INVESTMENT MANAGEMENT CO LLC Reduced -25,826-25.8k
MARATHON CAPITAL MANAGEMENT Reduced -25,000-25.0k
Legato Capital Management LLC Reduced -22,573-22.6k

Biggest calls

SIMPLEX TRADING, LLC Reduced $14.0k9.4k shares
CITADEL ADVISORS LLC Reduced $1.6k1.0k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Added $3.3k2.1k shares
GROUP ONE TRADING LLC Added $1.6k1.0k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Kaufman Daniel Louis 13G · passive investor new · filed 2026-08-19 5.9% new 6.0m≈ $10.2m 2026-08-19

Fell to 5% or below in the last year: Lagoda Investment Management, L.P. (4.5%, 2026-05-15)

Insider purchases and sales in Q3 2023

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
101Q4 21: 0 buyingQ4 21: 0 sellingQ1 22: 0 buyingQ1 22: 0 sellingQ1 22Q2 22: 1 buyingQ2 22: 0 sellingQ3 22: 0 buyingQ3 22: 0 sellingQ3 22Q4 22: 0 buyingQ4 22: 0 sellingQ1 23: 0 buyingQ1 23: 0 sellingQ1 23Q2 23: 0 buyingQ2 23: 0 sellingQ3 23: 1 buyingQ3 23: 0 sellingQ3 23
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20210—0——
Q1 20220—0——
Q2 20221$516.8k0——
Q3 20220—0——
Q4 20220—0——
Q1 20230—0——
Q2 20230—0——
Q3 20231$173.6k0——
DateInsiderTradeSharesPrice ValueTheir holding
2023-09-15 Isaac Paul J Director · See Footnote Bought 16,000 $1.63 $26.1k16.0k shares +1%
2023-09-14 Isaac Paul J Director · See Footnote Bought 7,168 $1.65 $11.8k7.2k shares +<1%
2023-09-13 Isaac Paul J Director · See Footnote Bought 6,305 $1.68 $10.6k6.3k shares +<1%
2023-09-12 Isaac Paul J Director · See Footnote Bought 1,200 $1.68 $2.0k1.2k shares +<1%
2023-08-30 Isaac Paul J Director · See Footnote Bought 10,000 $1.71 $17.1k10.0k shares +<1%
2023-08-29 Isaac Paul J Director · See Footnote Bought 6,739 $1.70 $11.5k6.7k shares +<1%
2023-08-28 Isaac Paul J Director · See Footnote Bought 9,311 $1.71 $15.9k9.3k shares +<1%
2023-08-25 Isaac Paul J Director · See Footnote Bought 5,000 $1.71 $8.6k5.0k shares +<1%
2023-08-24 Isaac Paul J Director · See Footnote Bought 4,000 $1.78 $7.1k4.0k shares +<1%
2023-08-22 Isaac Paul J Director · See Footnote Bought 6,000 $1.75 $10.5k6.0k shares +<1%
2023-08-21 Isaac Paul J Director · See Footnote Bought 6,198 $1.64 $10.2k6.2k shares +<1%
2023-08-17 Isaac Paul J Director · See Footnote Bought 6,000 $1.54 $9.2k6.0k shares +<1%
2023-08-16 Isaac Paul J Director · See Footnote Bought 4,685 $1.54 $7.2k4.7k shares +<1%
2023-08-15 Isaac Paul J Director · See Footnote Bought 16,687 $1.51 $25.2k16.7k shares +1%
2023-08-14 Isaac Paul J Director · See Footnote Bought 400 $1.51 $604400 shares +<1%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q3 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 DAFNA Capital Management LLC 6.72% of their portfolio LOS ANGELES, CA 13,680,55413.7m $21.6m $21.6m 6.72% Unchanged
2 Redmile Group, LLC 0.43% of their portfolio LARKSPUR, CA 5,765,7925.8m $9.1m $9.1m 0.43% Reduced -608.1k -608,106
3 Lagoda Investment Management, L.P. 3.37% of their portfolio NEW YORK, NY 3,249,7853.2m $5.1m $5.1m 3.37% Added +176.2k +176,150
4 Arbiter Partners Capital Management LLC 7.61% of their portfolio NEW YORK, NY 2,678,8072.7m $4.2m $4.2m 7.61% Added +105.7k +105,693
5 Archon Capital Management LLC 1.90% of their portfolio Seattle, WA 2,678,2752.7m $4.2m $4.2m 1.90% Added +223.8k +223,790
6 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 2,183,2302.2m $3.4m $3.4m 0.00% Added +7.6k +7,646
7 ESSEX INVESTMENT MANAGEMENT CO LLC 0.34% of their portfolio BOSTON, MA 1,309,1081.3m $2.1m $2.1m 0.34% Reduced -25.8k -25,826
8 BlackRock Inc. 0.00% of their portfolio New York, NY 1,072,2771.1m $1.7m $1.7m 0.00% Added +34.9k +34,858
9 Prescott Group Capital Management, L.L.C. 0.25% of their portfolio Tulsa, OK 722,720722.7k $1.1m $1.1m 0.25% Unchanged
10 AlphaCentric Advisors LLC 0.54% of their portfolio SAN JUAN, PR 600,000600.0k $948.0k $948.0k 0.54% Added +50.0k +50,000
11 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 539,070539.1k $852.0k $852.0k 0.00% Added +91.8k +91,765
12 Legato Capital Management LLC 0.11% of their portfolio San Francisco, CA 472,150472.1k $746.0k $746.0k 0.11% Reduced -22.6k -22,573
13 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 289,700289.7k $458.0k $458.0k 0.00% Added +24.7k +24,700
14 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio HOUSTON, TX 249,700249.7k $394.5k $394.5k 0.01% Reduced -76.2k -76,200
15 Verition Fund Management LLC 0.01% of their portfolio GREENWICH, CT 239,585239.6k $378.5k $378.5k 0.01% Added +37.3k +37,277
16 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 194,689194.7k $307.6k $307.6k 0.00% Unchanged
17 Kovack Advisors, Inc. 0.04% of their portfolio FT. LAUDERDALE, FL 191,907191.9k $303.2k $303.2k 0.04% Added +11.5k +11,488
18 State of Wyoming 0.06% of their portfolio CHEYENNE, WY 190,265190.3k $300.6k $300.6k 0.06% Added +54.0k +54,010
19 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 155,439155.4k $246.0k $246.0k 0.00% Reduced -790 -790
20 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 151,193151.2k $238.9k $238.9k 0.00% Reduced -22.3k -22,281
21 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 139,648139.6k $220.6k $220.6k 0.00% Added +56.8k +56,833
22 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 135,238135.2k $213.7k $213.7k 0.00% Reduced -948 -948
23 GMT Capital Corp 0.01% of their portfolio ATLANTA, GA 126,581126.6k $200.0k $200.0k 0.01% Unchanged
24 Independent Advisor Alliance 0.01% of their portfolio CHARLOTTE, NC 101,305101.3k $160.1k $160.1k 0.01% Added +10.0k +10,000
25 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 77,87977.9k $123.0k $123.0k 0.00% New
26 Polar Capital Holdings Plc 0.00% of their portfolio London, X0 76,68776.7k $121.2k $121.2k 0.00% Unchanged
27 Leonteq Securities AG 0.01% of their portfolio ZURICH, V8 74,99475.0k $119.2k $119.2k 0.01% Unchanged
28 WEALTH EFFECTS LLC 0.05% of their portfolio BOSTON, MA 69,06069.1k $109.1k $109.1k 0.05% Added +9.5k +9,500
29 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 58,40058.4k $93.0k $93.0k 0.00% Unchanged
30 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 44,59344.6k $70.5k $70.5k 0.00% Reduced -18.2k -18,210
31 Cherry Creek Investment Advisors, Inc. 0.04% of their portfolio ENGLEWOOD, CO 37,14937.1k $58.7k $58.7k 0.04% Reduced -1.7k -1,704
32 Wellington Shields & Co., LLC 0.01% of their portfolio NEW YORK, NY 35,39335.4k $55.9k $55.9k 0.01% Unchanged
33 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 34,18334.2k $54.0k $54.0k 0.00% New
34 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 23,95124.0k $37.8k $37.8k 0.00% Reduced -2.0k -1,999
35 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 22,69622.7k $35.9k $35.9k 0.00% Unchanged
36 Atom Investors LP 0.01% of their portfolio AUSTIN, TX 22,68622.7k $35.8k $35.8k 0.01% Reduced -5.5k -5,533
37 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 22,05622.1k $34.8k $34.8k 0.00% New
38 PNC Financial Services Group, Inc. 0.00% of their portfolio Pittsburgh, PA 18,00018.0k $28.4k $28.4k 0.00% Unchanged
39 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 17,24617.2k $27.2k $27.2k 0.00% Reduced -79.7k -79,664
40 Raymond James Financial Services Advisors, Inc. 0.00% of their portfolio ST. PETERSBURG, FL 16,88716.9k $26.7k $26.7k 0.00% Reduced -1.0k -1,000
41 Summit Asset Management, LLC 0.01% of their portfolio MEMPHIS, TN 16,56016.6k $26.2k $26.2k 0.01% Unchanged
42 Engineers Gate Manager LP 0.00% of their portfolio NEW YORK, NY 16,30216.3k $25.8k $25.8k 0.00% Unchanged
43 Coury Firm Asset Management LLC 0.04% of their portfolio PITTSBURGH, PA 16,10016.1k $25.4k $25.4k 0.04% Reduced -1.5k -1,500
44 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 15,64515.6k $24.7k $24.7k 0.00% Unchanged
45 Robertson Stephens Wealth Management, LLC 0.00% of their portfolio San Francisco, CA 15,00015.0k $23.7k $23.7k 0.00% Reduced -5.0k -5,000
46 PACIFIC GLOBAL INVESTMENT MANAGEMENT CO 0.00% of their portfolio Glendale, CA 14,00014.0k $22.1k $22.1k 0.00% Added +1.2k +1,250
47 EVERETT HARRIS & CO /CA/ 0.00% of their portfolio LOS ANGELES, CA 12,70012.7k $20.1k $20.1k 0.00% Unchanged
48 MARATHON CAPITAL MANAGEMENT 0.00% of their portfolio Hunt Valley, MD 12,25012.2k $19.4k $19.4k 0.00% Reduced -25.0k -25,000
49 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 10,94510.9k $17.3k $17.3k 0.00% New
50 Roble, Belko & Company, Inc 0.00% of their portfolio SEWICKLEY, PA 10,00010.0k $16.0k $16.0k 0.00% Unchanged
51 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 9,1339.1k $14.4k $14.4k 0.00% New
52 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 6,4716.5k $10.2k $10.2k 0.00% Unchanged
53 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 5,6105.6k $8.9k $8.9k 0.00% Added +500 +500
54 UBS Group AG 0.00% of their portfolio ZURICH, V8 2,6662.7k $4.2k $4.2k 0.00% Reduced -2.0k -1,963
55 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 1,1671.2k $1.0k $1.0k 0.00% Reduced -11.6k -11,612
56 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 797797 $1.3k $1.3k 0.00% Added +142 +142
57 Aspire Private Capital, LLC 0.00% of their portfolio Cornelius, NC 200200 $316 $316 0.00% Unchanged
58 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 112112 $177 $177 0.00% Unchanged
59 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged