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Simplex Trading Portfolio holdings
AUM
$184B
Turnover
28.44%
1-Year Est. Return
51.71%
Simplex Trading is a market maker that trades for its own account, mainly in US stock options and options on futures, using software it builds itself. Its work pairs software developers with data-driven traders. It was founded in Chicago in 2004, and Erik Swanson, who joined straight out of college as a trader, has been its chief executive since 2014. It also invests in early-stage financial and technology start-ups.
This Fund
S&P 500
This Quarter Est. Return
-0.22%
1 Year Est. Return
+51.71%
3 Year Est. Return
+194.66%
5 Year Est. Return
+164.83%
10 Year Est. Return
+968.67%
AUM
$184B
AUM Growth
+$13.3B
(+7.8%)
Cap. Flow
-$519M
Cap. Flow % of AUM
Cap. Flow %
-0.28%
Top 10 Holdings %
Top 10 Hldgs %
50.68%
Holding
10,644
New
1,493
Increased
3,697
Reduced
3,633
Closed
1,534
Avg Time Held
Equity + Options
3
years
Top 10 Avg Time Held
Equity + Options
3.9
years
Top 20 Avg Time Held
Equity + Options
4.3
years
Avg Time Held Equity only
0.5
years
Top 10 Avg Time Held Equity only
0.5
years
Top 20 Avg Time Held Equity only
0.4
years
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$92.6M |
| 2 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$80.6M |
| 3 |
Amazon
AMZN
|
+$26.3M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$25.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$20.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class A
GOOGL
|
+$128M |
| 2 |
NVIDIA
NVDA
|
+$97.8M |
| 3 |
Tesla
TSLA
|
+$53.9M |
| 4 |
Micron Technology
MU
|
+$50M |
| 5 |
United States Oil Fund
USO
|
+$49.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.84% |
| 2 | Technology | 0.45% |
| 3 | Consumer Discretionary | 0.14% |
| 4 | Healthcare | 0.14% |
| 5 | Financials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
326
PUT
IonQ
IONQ
$16.1B
| $33.5M | 0.02% |
763,700
-220,400
| -22% | -$8.93M |
2021 Q1
22 quarters
|
|
327
PUT
Rigetti Computing
RGTI
$4.08B
| $33.2M | 0.02% |
2,106,400
+373,500
| +22% | +$6.02M |
2023 Q3
12 quarters
|
|
328
PUT
Lockheed Martin
LMT
$139B
| $33.1M | 0.02% |
65,000
+13,200
| +25% | +$7.26M |
2014 Q4
47 quarters
|
|
329
PUT
Verizon
VZ
$192B
| $33.1M | 0.02% |
721,300
-639,400
| -47% | -$30.1M |
2014 Q4
47 quarters
|
|
330
PUT
Walt Disney
DIS
$206B
| $33M | 0.02% |
315,000
+1,100
| +0.4% | +$113K |
2021 Q2
21 quarters
|
|
331
CALL
Petrobras
PBR
$117B
| $32.9M | 0.02% |
1,595,800
-767,300
| -32% | -$14.6M |
2026 Q1
2 quarters
|
|
332
CALL
Carvana
CVNA
$79.8B
| $32.9M | 0.02% |
526,400
-2,461,500
| -82% | -$168M |
2021 Q2
21 quarters
|
|
333
PUT
Nu Holdings
NU
$58.1B
| $32.7M | 0.02% |
2,581,400
+1,473,500
| +133% | +$20.9M |
2021 Q4
19 quarters
|
|
334
CALL
Okta
OKTA
$31.1B
| $32.6M | 0.02% |
155,800
+17,200
| +12% | +$2.72M |
2021 Q2
21 quarters
|
|
335
PUT
AT&T
T
$147B
| $32.5M | 0.02% |
1,331,900
+458,600
| +53% | +$11.1M |
2014 Q4
47 quarters
|
|
336
PUT
Accenture
ACN
$153B
| $32.5M | 0.02% |
177,000
-9,100
| -5% | -$1.54M |
2021 Q2
21 quarters
|
|
337
CALL
Block Inc
XYZ
$51.3B
| $32.4M | 0.02% |
440,700
+3,200
| +0.7% | +$255K |
2015 Q4
43 quarters
|
|
338
Freeport-McMoran
FCX
$86.4B
| $32.4M | 0.02% |
462,800
-164,005
| -26% | -$11.2M |
2025 Q3
4 quarters
|
|
339
CALL
Chipotle Mexican Grill
CMG
$45.4B
| $32.4M | 0.02% |
1,013,000
+213,900
| +27% | +$7.41M |
2021 Q2
21 quarters
|
|
340
PUT
Credo Technology Group
CRDO
$24.5B
| $32.3M | 0.02% |
165,800
+54,200
| +49% | +$11.7M |
2026 Q1
2 quarters
|
|
341
PUT
Spotify
SPOT
$124B
| $32.3M | 0.02% |
66,200
+20,100
| +44% | +$10.2M |
2018 Q2
33 quarters
|
|
|
342
CALL
Lockheed Martin
LMT
$139B
| $32.2M | 0.02% |
63,200
-13,600
| -18% | -$7.48M |
2014 Q4
47 quarters
|
|
343
CALL
Amphenol
APH
$196B
| $32.2M | 0.02% |
381,500
+59,900
| +19% | +$4.83M |
2016 Q1
42 quarters
|
|
344
PUT
Barrick Mining
B
$66B
| $32.1M | 0.02% |
789,800
+205,300
| +35% | +$8.41M |
2021 Q2
21 quarters
|
|
345
PUT
Blackstone
BX
$96.6B
| $31.8M | 0.02% |
284,100
-30,100
| -10% | -$3.94M |
2014 Q4
47 quarters
|
|
346
PUT
Applied Optoelectronics
AAOI
$4.41B
| $31.8M | 0.02% |
319,900
+4,300
| +1% | +$483K |
2023 Q1
14 quarters
|
|
347
CALL
Philip Morris
PM
$303B
| $31.6M | 0.02% |
165,600
+27,400
| +20% | +$5.18M |
2014 Q4
47 quarters
|
|
348
PUT
United Parcel Service
UPS
$94.5B
| $31.5M | 0.02% |
337,600
+23,500
| +7% | +$2.47M |
2020 Q4
23 quarters
|
|
349
PUT
Procter & Gamble
PG
$391B
| $31.5M | 0.02% |
216,500
-54,000
| -20% | -$7.91M |
2021 Q2
21 quarters
|
|
350
PUT
United Airlines
UAL
$38.9B
| $31.4M | 0.02% |
282,600
-31,900
| -10% | -$3.76M |
2014 Q4
47 quarters
|
|
Similar funds
Simplex Trading's Q3 2026 Portfolio in Review
As of Q3 2026, Simplex Trading held 10,644 positions worth $184B, up 7.8% from $171B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q3 2026 filing shows 1,493 new, 3,697 increased, 3,633 reduced and 1,534 closed positions. Its largest new stake was iShares iBoxx $ High Yield Corporate Bond ETF: 1,017,542 shares worth $78.6M. The largest sale was Alphabet (Google) Class A, an estimated $128M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q3 2026 buy was iShares iBoxx $ High Yield Corporate Bond ETF: 1,017,542 shares worth $78.6M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q3 2026, an estimated $92.6M increase.
- Simplex Trading's biggest Q3 2026 reduction was NVIDIA, cutting an estimated $97.8M.
- Simplex Trading fully exited Alphabet (Google) Class A in Q3 2026, selling an estimated $128M.
- Simplex Trading's ten largest holdings make up 51% of its $184B portfolio in Q3 2026.
- Simplex Trading opened 1,493 new positions and closed 1,534 in Q3 2026.
- Simplex Trading's portfolio value rose 7.8% quarter-over-quarter to $184B.
Based on Simplex Trading's 13F filing for Q3 2026, filed 4 Nov 2026.