Vault-13

STEREOTAXIS INC STXS

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

American medical robotics company

75 institutional holders +3 vs Q3 2022
35,629,74835.6m shares reported held*
47.6% of all shares outstanding*
$73.8mreported value*
9 new 23 added 19 reduced 5 sold out net bought ≈ $272.4k (+131.6k 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: 74.8m as of 2022-10-31, 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 ≈ $2.07. Options: 4 managers hold calls ($50.6k notional), 3 hold puts ($2.5k).

Trends to Q4 2022

Institutional holders

Managers reporting a position, each quarter

0255075Q3 22: 72Q4 22: 7575Q3 22Q4 22
Numbers
QuarterHolders
Q3 202272
Q4 202275

Calls vs puts

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

CallsPuts
$0$100k$200k$300kQ3 22 calls: $212.0kQ3 22 puts: $0Q3 22P/C 0.00Q4 22 calls: $50.6kQ4 22 puts: $2.5kQ4 22P/C 0.05
Numbers
QuarterCallsPutsP/C
Q3 2022$212.0k$00.00
Q4 2022$50.6k$2.5k0.05

Biggest buyers

Lagoda Investment Management, L.P. Added +297,725+297.7k
Legato Capital Management LLC New +259,890+259.9k
BRIDGEWAY CAPITAL MANAGEMENT, LLC Added +167,100+167.1k
Prescott Group Capital Management, L.L.C. Added +157,017+157.0k
ESSEX INVESTMENT MANAGEMENT CO LLC Added +143,746+143.7k
CITADEL ADVISORS LLC Added +121,869+121.9k
Kovack Advisors, Inc. Added +97,496+97.5k
SUSQUEHANNA INTERNATIONAL GROUP, LLP New +82,464+82.5k
NORTH RUN CAPITAL, LP Added +71,590+71.6k
D. E. Shaw & Co., Inc. Added +69,740+69.7k

Biggest sellers

Penn Capital Management Company, LLC Reduced -402,819-402.8k
Opaleye Management Inc. Reduced -371,800-371.8k
Verition Fund Management LLC Reduced -194,208-194.2k
Ergoteles LLC Reduced -149,816-149.8k
GMT Capital Corp Sold out -126,581-126.6k
UBS Group AG Reduced -81,641-81.6k
RENAISSANCE TECHNOLOGIES LLC Reduced -58,900-58.9k
TWO SIGMA ADVISERS, LP Reduced -37,200-37.2k
MILLENNIUM MANAGEMENT LLC Reduced -33,184-33.2k
MORGAN STANLEY Reduced -32,222-32.2k

Biggest calls

CITADEL ADVISORS LLC Reduced $20.9k10.1k shares
GROUP ONE TRADING LLC Reduced $20.7k10.0k shares
SIMPLEX TRADING, LLC New $9.0k4.6k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC New $2.5k1.2k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares
SIMPLEX TRADING, LLC Reduced $0100 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 Q4 2022

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
101Q1 21: 0 buyingQ1 21: 0 sellingQ2 21: 0 buyingQ2 21: 0 sellingQ2 21Q3 21: 0 buyingQ3 21: 0 sellingQ4 21: 0 buyingQ4 21: 0 sellingQ4 21Q1 22: 0 buyingQ1 22: 0 sellingQ2 22: 1 buyingQ2 22: 0 sellingQ2 22Q3 22: 0 buyingQ3 22: 0 sellingQ4 22: 0 buyingQ4 22: 0 sellingQ4 22
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q1 20210—0——
Q2 20210—0——
Q3 20210—0——
Q4 20210—0——
Q1 20220—0——
Q2 20221$516.8k0——
Q3 20220—0——
Q4 20220—0——

None reported in Q4 2022.

Holders, Q4 2022

#ManagerLocationShares Value% of their portfolioChangeShares change
1 DAFNA Capital Management LLC 7.98% of their portfolio LOS ANGELES, CA 13,680,55413.7m $28.3m $28.3m 7.98% Unchanged
2 Arbiter Partners Capital Management LLC 6.34% of their portfolio NEW YORK, NY 2,573,1142.6m $5.3m $5.3m 6.34% Added +18.5k +18,531
3 Lagoda Investment Management, L.P. 3.48% of their portfolio NEW YORK, NY 2,492,6652.5m $5.2m $5.2m 3.48% Added +297.7k +297,725
4 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 2,118,2592.1m $4.4m $4.4m 0.00% Added +1.6k +1,643
5 Iron Triangle Partners LP 0.62% of their portfolio Cos Cob, CT 1,671,1091.7m $3.5m $3.5m 0.62% Reduced -25.5k -25,490
6 Redmile Group, LLC 0.13% of their portfolio LARKSPUR, CA 1,487,4951.5m $3.1m $3.1m 0.13% Unchanged
7 Opaleye Management Inc. 0.85% of their portfolio BOSTON, MA 1,185,0001.2m $2.5m $2.5m 0.85% Reduced -371.8k -371,800
8 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 1,170,8081.2m $2.4m $2.4m 0.00% Reduced -33.2k -33,184
9 BlackRock Inc. 0.00% of their portfolio New York, NY 1,013,1111.0m $2.1m $2.1m 0.00% Added +2.9k +2,932
10 Rhenman & Partners Asset Management AB 0.17% of their portfolio Stockholm, V7 797,330797.3k $1.7m $1.7m 0.17% Unchanged
11 ESSEX INVESTMENT MANAGEMENT CO LLC 0.22% of their portfolio BOSTON, MA 696,197696.2k $1.4m $1.4m 0.22% Added +143.7k +143,746
12 Prescott Group Capital Management, L.L.C. 0.26% of their portfolio Tulsa, OK 585,072585.1k $1.2m $1.2m 0.26% Added +157.0k +157,017
13 AlphaCentric Advisors LLC 1.02% of their portfolio SAN JUAN, PR 500,000500.0k $1.0m $1.0m 1.02% Unchanged
14 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 498,600498.6k $1.0m $1.0m 0.00% Reduced -58.9k -58,900
15 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 444,787444.8k $920.0k $920.0k 0.00% Added +4.9k +4,917
16 SILVERARC CAPITAL MANAGEMENT, LLC 0.25% of their portfolio BOSTON, MA 354,925354.9k $734.7k $734.7k 0.25% Added +8.7k +8,694
17 NORTH RUN CAPITAL, LP 1.53% of their portfolio BOSTON, MA 322,750322.8k $668.1k $668.1k 1.53% Added +71.6k +71,590
18 GSA CAPITAL PARTNERS LLP 0.08% of their portfolio LONDON, X0 315,949315.9k $654.0k $654.0k 0.08% Added +37.0k +37,028
19 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 282,400282.4k $584.6k $584.6k 0.00% Reduced -37.2k -37,200
20 Legato Capital Management LLC 0.10% of their portfolio San Francisco, CA 259,890259.9k $538.0k $538.0k 0.10% New
21 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 248,327248.3k $514.0k $514.0k 0.00% Added +34.1k +34,088
22 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio HOUSTON, TX 243,300243.3k $503.6k $503.6k 0.01% Added +167.1k +167,100
23 Verition Fund Management LLC 0.01% of their portfolio GREENWICH, CT 220,608220.6k $456.7k $456.7k 0.01% Reduced -194.2k -194,208
24 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 199,295199.3k $412.5k $412.5k 0.00% Added +69.7k +69,740
25 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 197,261197.3k $408.3k $408.3k 0.00% Added +121.9k +121,869
26 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 172,989173.0k $358.1k $358.1k 0.00% Unchanged
27 Kovack Advisors, Inc. 0.05% of their portfolio FT. LAUDERDALE, FL 165,429165.4k $342.4k $342.4k 0.05% Added +97.5k +97,496
28 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 155,439155.4k $322.0k $322.0k 0.00% Reduced -119 -119
29 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 147,518147.5k $305.0k $305.0k 0.00% Unchanged
30 Leonteq Securities AG 0.01% of their portfolio ZURICH, V8 113,994114.0k $234.8k $234.8k 0.01% Unchanged
31 Penn Capital Management Company, LLC 0.02% of their portfolio PHILADELPHIA, PA 111,538111.5k $230.9k $230.9k 0.02% Reduced -402.8k -402,819
32 Independent Advisor Alliance 0.01% of their portfolio CHARLOTTE, NC 109,605109.6k $227.0k $227.0k 0.01% Added +9.2k +9,220
33 State of Wyoming 0.07% of their portfolio CHEYENNE, WY 98,44598.4k $203.8k $203.8k 0.07% Added +10.7k +10,651
34 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 82,46482.5k $170.7k $170.7k 0.00% New
35 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 78,36878.4k $162.2k $162.2k 0.00% Unchanged
36 Polar Capital Holdings Plc 0.00% of their portfolio London, X0 76,68776.7k $158.7k $158.7k 0.00% Unchanged
37 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 52,77952.8k $109.3k $109.3k 0.00% Added +13.5k +13,465
38 WEALTH EFFECTS LLC 0.06% of their portfolio BOSTON, MA 48,26048.3k $99.9k $99.9k 0.06% Reduced -400 -400
39 MARATHON CAPITAL MANAGEMENT 0.03% of their portfolio Hunt Valley, MD 47,25047.2k $104.0k $104.0k 0.03% Unchanged
40 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 46,30046.3k $96.0k $96.0k 0.00% Added +12.7k +12,700
41 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 45,84245.8k $94.9k $94.9k 0.00% Reduced -32.2k -32,222
42 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 44,09144.1k $91.3k $91.3k 0.00% Reduced -138 -138
43 Atom Investors LP 0.05% of their portfolio AUSTIN, TX 43,49443.5k $90.0k $90.0k 0.05% Reduced -5.8k -5,778
44 J.P. Morgan Private Wealth Advisors LLC 0.00% of their portfolio SAN FRANCISCO, CA 41,59341.6k $86.1k $86.1k 0.00% Unchanged
45 Ergoteles LLC 0.00% of their portfolio NEW YORK, NY 39,57039.6k $81.9k $81.9k 0.00% Reduced -149.8k -149,816
46 Wellington Shields & Co., LLC 0.02% of their portfolio NEW YORK, NY 37,39337.4k $77.4k $77.4k 0.02% Added +21.9k +21,893
47 Cherry Creek Investment Advisors, Inc. 0.05% of their portfolio ENGLEWOOD, CO 32,50632.5k $67.3k $67.3k 0.05% Unchanged
48 Virtu Financial LLC 0.01% of their portfolio New York, NY 28,38228.4k $59.0k $59.0k 0.01% New
49 EVERETT HARRIS & CO /CA/ 0.00% of their portfolio LOS ANGELES, CA 22,70022.7k $47.0k $47.0k 0.00% Reduced -2.3k -2,300
50 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 22,69622.7k $47.0k $47.0k 0.00% Unchanged
51 Robertson Stephens Wealth Management, LLC 0.00% of their portfolio San Francisco, CA 20,00020.0k $41.4k $41.4k 0.00% Reduced -5.0k -5,000
52 PNC Financial Services Group, Inc. 0.00% of their portfolio Pittsburgh, PA 18,00018.0k $37.3k $37.3k 0.00% Unchanged
53 Coury Firm Asset Management LLC 0.05% of their portfolio PITTSBURGH, PA 17,60017.6k $36.4k $36.4k 0.05% Unchanged
54 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 17,16817.2k $35.5k $35.5k 0.00% New
55 Summit Asset Management, LLC 0.01% of their portfolio MEMPHIS, TN 16,56016.6k $34.3k $34.3k 0.01% Unchanged
56 Engineers Gate Manager LP 0.00% of their portfolio NEW YORK, NY 16,30216.3k $33.7k $33.7k 0.00% Reduced -18.1k -18,089
57 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 15,64515.6k $32.4k $32.4k 0.00% Unchanged
58 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 12,66712.7k $26.2k $26.2k 0.00% New
59 Affinity Capital Advisors, LLC 0.01% of their portfolio BERKELEY, CA 11,90011.9k $24.6k $24.6k 0.01% Unchanged
60 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 11,68711.7k $25.0k $25.0k 0.00% Unchanged
61 Man Group plc 0.00% of their portfolio LONDON, X0 10,85110.9k $22.5k $22.5k 0.00% New
62 Warberg Asset Management LLC 0.01% of their portfolio WINNETKA, IL 10,00010.0k $20.6k $20.6k 0.01% Unchanged
63 BDO Wealth Advisors, LLC 0.00% of their portfolio JACKSONVILLE, FL 10,00010.0k $20.7k $20.7k 0.00% Unchanged
64 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 9,7859.8k $20.3k $20.3k 0.00% New
65 MONEY CONCEPTS CAPITAL CORP 0.00% of their portfolio PALM BEACH GARDENS, FL 3,0003.0k $6.2k $6.2k 0.00% Unchanged
66 GODSEY & GIBB, INC 0.00% of their portfolio RICHMOND, VA 1,5661.6k $3.2k $3.2k 0.00% New
67 FMR LLC 0.00% of their portfolio BOSTON, MA 929929 $1.9k $1.9k 0.00% Added +740 +740
68 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 726726 $1.5k $1.5k 0.00% New
69 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 612612 $1.3k $1.3k 0.00% Added +8 +8
70 Aspire Private Capital, LLC 0.00% of their portfolio Cornelius, NC 200200 $414 $414 0.00% Unchanged
71 UBS Group AG 0.00% of their portfolio ZURICH, V8 136136 $282 $282 0.00% Reduced -81.6k -81,641
72 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 119119 $0 $0 0.00% Added +7 +7
73 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 100100 $0 $0 0.00% Reduced -25 -25
74 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 5757 $118 $118 0.00% Reduced -1.5k -1,535
75 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged