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 | |
|---|---|---|---|---|---|---|
4276
CALL
Keros Therapeutics
KROS
$197M
| $331K | ﹤0.01% |
+5,000
| New | +$296K |
|
|
RNAM
4277
PUT
DELISTED
Avidity Biosciences
RNAM
| $331K | ﹤0.01% |
13,000
+10,100
| +348% | +$158K |
|
4278
CALL
Addus HomeCare
ADUS
$2.22B
| $330K | ﹤0.01% |
3,200
+1,900
| +146% | +$178K |
|
4279
American Water Works
AWK
$27B
| $330K | ﹤0.01% |
+2,708
| New | +$333K |
|
4280
Curtiss-Wright
CW
$25.1B
| $330K | ﹤0.01% |
+1,293
| New | +$301K |
|
|
SNBR
4281
CALL
DELISTED
Sleep Number
SNBR
| $330K | ﹤0.01% |
20,600
-6,300
| -23% | -$81.7K |
|
4282
PUT
Visteon
VC
$2.85B
| $329K | ﹤0.01% |
2,800
-400
| -13% | -$46.7K |
|
4283
BHP
BHP
$211B
| $328K | ﹤0.01% |
5,701
-106,799
| -95% | -$6.39M |
|
4284
PUT
Editas Medicine
EDIT
$399M
| $328K | ﹤0.01% |
44,300
+2,400
| +6% | +$19.9K |
|
4285
CALL
Expeditors International
EXPD
$22.3B
| $328K | ﹤0.01% |
2,700
+1,900
| +238% | +$235K |
|
4286
Opko Health
OPK
$1.02B
| $328K | ﹤0.01% |
273,551
+125,191
| +84% | +$125K |
|
4287
CALL
Old Republic International
ORI
$10.9B
| $328K | ﹤0.01% |
10,700
-15,700
| -59% | -$456K |
|
4288
PUT
Dream Finders Homes
DFH
$1.41B
| $327K | ﹤0.01% |
7,500
+7,200
| +2,400% | +$254K |
|
4289
CALL
Evercore
EVR
$11.8B
| $327K | ﹤0.01% |
1,700
-2,100
| -55% | -$380K |
|
4290
CALL
GXO Logistics
GXO
$5.93B
| $327K | ﹤0.01% |
6,100
-21,000
| -77% | -$1.14M |
|
4291
CALL
MGP Ingredients
MGPI
$403M
| $327K | ﹤0.01% |
3,800
-112,300
| -97% | -$9.73M |
|
|
LLAP
4292
PUT
DELISTED
Terran Orbital Corporation
LLAP
| $327K | ﹤0.01% |
250,000
+233,000
| +1,371% | +$235K |
|
|
CIM
4293
Chimera Investment
CIM
$1.06B
| $326K | ﹤0.01% |
+23,637
| New | +$329K |
|
4294
Calumet Specialty Products
CLMT
$3.7B
| $326K | ﹤0.01% |
+21,990
| New | +$350K |
|
4295
PUT
HealthEquity
HQY
$8.71B
| $326K | ﹤0.01% |
4,000
+3,600
| +900% | +$281K |
|
4296
Atlas Lithium Corp
ATLX
$75.5M
| $325K | ﹤0.01% |
19,122
+17,204
| +897% | +$343K |
|
4297
Elanco Animal Health
ELAN
$13.2B
| $325K | ﹤0.01% |
20,004
-63,570
| -76% | -$994K |
|
|
TGNA
4298
CALL
DELISTED
TEGNA Inc
TGNA
| $325K | ﹤0.01% |
21,800
-70,900
| -76% | -$1.05M |
|
4299
TORM
TRMD
$3.05B
| $325K | ﹤0.01% |
9,324
-7,316
| -44% | -$249K |
|
|
AIV
4300
Aimco
AIV
$377M
| $324K | ﹤0.01% |
39,567
-9,058
| -19% | -$69.2K |
|
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.