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 | |
|---|---|---|---|---|---|---|
7301
Aware
AWRE
$24.2M
| $15K | ﹤0.01% |
8,507
+7,339
| +628% | +$12.8K |
|
7302
CALL
Atlanta Braves Holdings Series B
BATRK
$3.27B
| $15K | ﹤0.01% |
400
-3,600
| -90% | -$142K |
|
7303
Butterfly Network
BFLY
$1.88B
| $15K | ﹤0.01% |
+14,535
| New | +$15.6K |
|
7304
Bionano Genomics
BNGO
$12.5M
| $15K | ﹤0.01% |
+227
| New | +$16.9K |
|
7305
CALL
Pathward Financial
CASH
$1.87B
| $15K | ﹤0.01% |
300
-29,600
| -99% | -$1.5M |
|
7306
Ceragon Networks
CRNT
$195M
| $15K | ﹤0.01% |
+4,953
| New | +$13.6K |
|
7307
CALL
Crexendo
CXDO
$223M
| $15K | ﹤0.01% |
3,200
+2,800
| +700% | +$15.5K |
|
|
DENN
7308
PUT
DELISTED
Denny's
DENN
| $15K | ﹤0.01% |
1,700
-32,700
| -95% | -$321K |
|
|
DESP
7309
DELISTED
Despegar.com
DESP
| $15K | ﹤0.01% |
1,291
-27,276
| -95% | -$258K |
|
7310
Digimarc Corp
DMRC
$145M
| $15K | ﹤0.01% |
571
-5,515
| -91% | -$191K |
|
7311
PUT
Dole
DOLE
$1.35B
| $15K | ﹤0.01% |
1,300
-200
| -13% | -$2.32K |
|
7312
Embecta
EMBC
$213M
| $15K | ﹤0.01% |
1,189
+701
| +144% | +$10.9K |
|
7313
Enanta Pharmaceuticals
ENTA
$367M
| $15K | ﹤0.01% |
889
+150
| +20% | +$1.99K |
|
7314
CALL
First Bancorp
FBP
$4.47B
| $15K | ﹤0.01% |
900
+200
| +29% | +$3.32K |
|
|
FINV
7315
FinVolution Group
FINV
$1.16B
| $15K | ﹤0.01% |
+3,170
| New | +$15.6K |
|
|
MCHB
7316
CALL
Mechanics Bancorp
MCHB
$3.51B
| $15K | ﹤0.01% |
1,000
-4,000
| -80% | -$54.9K |
|
7317
CALL
Ingles Markets
IMKTA
$1.71B
| $15K | ﹤0.01% |
+200
| New | +$16K |
|
7318
PUT
James River Group Holdings
JRVR
$222M
| $15K | ﹤0.01% |
+1,700
| New | +$15.6K |
|
7319
PUT
Lifecore Biomedical
LFCR
$165M
| $15K | ﹤0.01% |
3,000
-3,400
| -53% | -$24.3K |
|
7320
Limoneira
LMNR
$245M
| $15K | ﹤0.01% |
778
-12,359
| -94% | -$230K |
|
7321
CALL
Luxfer Holdings
LXFR
$456M
| $15K | ﹤0.01% |
1,500
+100
| +7% | +$895 |
|
7322
PUT
908 Devices
MASS
$288M
| $15K | ﹤0.01% |
2,000
+1,800
| +900% | +$13.3K |
|
7323
PUT
New Mountain Finance
NMFC
$668M
| $15K | ﹤0.01% |
1,200
-900
| -43% | -$11.5K |
|
|
ODP
7324
DELISTED
ODP
ODP
| $15K | ﹤0.01% |
+292
| New | +$15.3K |
|
|
OLO
7325
CALL
DELISTED
Olo Inc
OLO
| $15K | ﹤0.01% |
+2,900
| New | +$15.8K |
|
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.