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 | |
|---|---|---|---|---|---|---|
|
ALEX
6401
CALL
DELISTED
Alexander & Baldwin
ALEX
| $42K | ﹤0.01% |
2,600
+200
| +8% | +$3.44K |
|
6402
CALL
Atea Pharmaceuticals
AVIR
$379M
| $42K | ﹤0.01% |
+10,400
| New | +$40.7K |
|
6403
PUT
BlackSky Technology
BKSY
$939M
| $42K | ﹤0.01% |
3,900
+2,800
| +255% | +$30.7K |
|
6404
PUT
BRC Inc
BRCC
$122M
| $42K | ﹤0.01% |
9,900
+1,100
| +13% | +$4.56K |
|
|
BRSP
6405
PUT
BrightSpire Capital
BRSP
$634M
| $42K | ﹤0.01% |
6,200
+5,900
| +1,967% | +$41.2K |
|
6406
CALL
Americold
COLD
$4.02B
| $42K | ﹤0.01% |
1,700
+300
| +21% | +$8.19K |
|
6407
PUT
DXC Technology
DXC
$1.8B
| $42K | ﹤0.01% |
2,000
-4,800
| -71% | -$105K |
|
6408
Energy Recovery
ERII
$443M
| $42K | ﹤0.01% |
2,684
+2,295
| +590% | +$36.5K |
|
6409
Expensify
EXFY
$174M
| $42K | ﹤0.01% |
+22,935
| New | +$43.5K |
|
6410
CALL
Federal Signal
FSS
$7.66B
| $42K | ﹤0.01% |
500
-11,000
| -96% | -$862K |
|
|
MOFG
6411
PUT
DELISTED
MidWestOne Financial Group
MOFG
| $42K | ﹤0.01% |
1,800
| – | – |
|
|
MTLS
6412
PUT
Materialise
MTLS
$368M
| $42K | ﹤0.01% |
8,000
-15,500
| -66% | -$87K |
|
6413
NBT Bancorp
NBTB
$2.74B
| $42K | ﹤0.01% |
+1,154
| New | +$41.8K |
|
6414
PUT
Pembina Pipeline
PBA
$28.4B
| $42K | ﹤0.01% |
1,200
-900
| -43% | -$31K |
|
6415
Precigen
PGEN
$2.22B
| $42K | ﹤0.01% |
29,207
+10,207
| +54% | +$14.7K |
|
|
PLYM
6416
PUT
DELISTED
Plymouth Industrial REIT
PLYM
| $42K | ﹤0.01% |
1,900
+200
| +12% | +$4.46K |
|
|
SNCY
6417
CALL
DELISTED
Sun Country Airlines
SNCY
| $42K | ﹤0.01% |
2,800
+2,700
| +2,700% | +$38.9K |
|
6418
UroGen Pharma
URGN
$1.85B
| $42K | ﹤0.01% |
2,805
-3,846
| -58% | -$62.9K |
|
|
AMK
6419
DELISTED
AssetMark Financial Holdings, Inc.
AMK
| $42K | ﹤0.01% |
+1,209
| New | +$39.5K |
|
|
FSR
6420
CALL
DELISTED
Fisker Inc.
FSR
| $42K | ﹤0.01% |
2,025,800
+606,000
| +43% | +$424K |
|
|
LUNA
6421
CALL
DELISTED
Luna Innovations Incorporated
LUNA
| $42K | ﹤0.01% |
13,300
+6,400
| +93% | +$40.8K |
|
|
INBX
6422
DELISTED
Inhibrx, Inc. Common Stock
INBX
| $42K | ﹤0.01% |
1,215
-34,646
| -97% | -$1.26M |
|
|
EFOR
6423
PUT
Everforth Inc
EFOR
$1.16B
| $41K | ﹤0.01% |
400
| – | – |
|
6424
PUT
Axalta
AXTA
$7.68B
| $41K | ﹤0.01% |
1,200
-100
| -8% | -$3.27K |
|
6425
Pathward Financial
CASH
$1.86B
| $41K | ﹤0.01% |
822
+704
| +597% | +$35.7K |
|
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.