Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6351
PUT
Hyliion Holdings
HYLN
$635M
| $45K | ﹤0.01% |
25,700
+19,600
| +321% | +$25.7K |
|
6352
CALL
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.4B
| $45K | ﹤0.01% |
+700
| New | +$43.3K |
|
6353
CALL
Oxford Square Capital
OXSQ
$163M
| $45K | ﹤0.01% |
+14,200
| New | +$43.4K |
|
6354
CALL
PDS Biotechnology
PDSB
$38.4M
| $45K | ﹤0.01% |
11,500
-10,200
| -47% | -$52.5K |
|
|
HTO
6355
CALL
H2O America
HTO
$2.57B
| $45K | ﹤0.01% |
800
-18,500
| -96% | -$1.1M |
|
|
SNCR
6356
CALL
DELISTED
Synchronoss Technologies
SNCR
| $45K | ﹤0.01% |
+5,500
| New | +$43.3K |
|
6357
PUT
Vanguard US Value Factor ETF
VFVA
$895M
| $45K | ﹤0.01% |
+300
| New | +$33.7K |
|
6358
Vontier
VNT
$4.52B
| $45K | ﹤0.01% |
1,002
-4,881
| -83% | -$190K |
|
|
6359
PUT
Vontier
VNT
$4.52B
| $45K | ﹤0.01% |
1,000
+500
| +100% | +$19.5K |
|
6360
AudioCodes
AUDC
$244M
| $44K | ﹤0.01% |
3,396
-796
| -19% | -$10.2K |
|
6361
Avantis US Equity ETF
AVUS
$14B
| $44K | ﹤0.01% |
+500
| New | +$42.2K |
|
6362
CALL
Bionano Genomics
BNGO
$12.3M
| $44K | ﹤0.01% |
673
-334
| -33% | -$24.9K |
|
6363
CALL
Glacier Bancorp
GBCI
$6.42B
| $44K | ﹤0.01% |
1,100
| – | – |
|
6364
PUT
Gevo
GEVO
$360M
| $44K | ﹤0.01% |
58,000
+56,600
| +4,043% | +$49.2K |
|
6365
CALL
Greenlight Captial
GLRE
$552M
| $44K | ﹤0.01% |
+3,600
| New | +$42.1K |
|
6366
Hanmi Financial
HAFC
$945M
| $44K | ﹤0.01% |
2,800
+766
| +38% | +$12.5K |
|
6367
PUT
Matsons
MATX
$6.13B
| $44K | ﹤0.01% |
400
| – | – |
|
6368
PUT
Monarch Casino & Resort
MCRI
$2.2B
| $44K | ﹤0.01% |
+600
| New | +$41.6K |
|
6369
Amplify Alternative Harvest ETF
MJ
$101M
| $44K | ﹤0.01% |
896
-6,489
| -88% | -$275K |
|
6370
Ultragenyx Pharmaceutical
RARE
$2.45B
| $44K | ﹤0.01% |
+954
| New | +$45K |
|
6371
CALL
Construction Partners
ROAD
$5.84B
| $44K | ﹤0.01% |
800
-100
| -11% | -$4.73K |
|
6372
PUT
Red Robin
RRGB
$145M
| $44K | ﹤0.01% |
5,800
+5,400
| +1,350% | +$49.6K |
|
6373
PUT
Runway Growth Finance
RWAY
$232M
| $44K | ﹤0.01% |
3,700
+1,000
| +37% | +$12.9K |
|
6374
SkyWater Technology
SKYT
$1.6B
| $44K | ﹤0.01% |
4,413
-8,335
| -65% | -$82.1K |
|
6375
PUT
SLR Investment Corp
SLRC
$686M
| $44K | ﹤0.01% |
2,900
+2,700
| +1,350% | +$40.9K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.