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 | |
|---|---|---|---|---|---|---|
1276
CALL
Northern Trust
NTRS
$22.2B
| $7.9M | ﹤0.01% |
88,900
+10,200
| +13% | +$837K |
|
1277
CALL
Wabtec
WAB
$51.1B
| $7.89M | ﹤0.01% |
54,200
+8,100
| +18% | +$1.1M |
|
1278
CALL
FMC
FMC
$1.42B
| $7.89M | ﹤0.01% |
123,900
+77,200
| +165% | +$4.51M |
|
1279
PUT
ProShares UltraShort Health Care
RXD
$3.25M
| $7.89M | ﹤0.01% |
235,150
+64,300
| +38% | +$1.4M |
|
1280
CALL
CSX Corp
CSX
$98.6B
| $7.88M | ﹤0.01% |
212,700
+15,200
| +8% | +$555K |
|
1281
CALL
Matador Resources
MTDR
$6.31B
| $7.87M | ﹤0.01% |
117,900
+29,800
| +34% | +$1.77M |
|
1282
CALL
Symbotic
SYM
$5.11B
| $7.87M | ﹤0.01% |
174,800
+15,500
| +10% | +$679K |
|
1283
CALL
SoundHound AI
SOUN
$2.68B
| $7.86M | ﹤0.01% |
1,335,000
+1,014,900
| +317% | +$4.02M |
|
1284
CALL
Enbridge
ENB
$124B
| $7.85M | ﹤0.01% |
217,100
-207,700
| -49% | -$7.37M |
|
1285
PUT
Lucid Motors
LCID
$2.46B
| $7.84M | ﹤0.01% |
275,170
+123,750
| +82% | +$3.95M |
|
|
UCD
1286
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $7.82M | ﹤0.01% |
136,300
-234,900
| -63% | -$13.5M |
|
1287
CALL
Carlisle Companies
CSL
$13.6B
| $7.8M | ﹤0.01% |
19,900
-3,300
| -14% | -$1.12M |
|
1288
PUT
Capri Holdings
CPRI
$1.77B
| $7.75M | ﹤0.01% |
171,200
+82,400
| +93% | +$3.93M |
|
1289
PUT
UBS Group
UBS
$170B
| $7.75M | ﹤0.01% |
252,400
-188,800
| -43% | -$5.58M |
|
1290
PUT
Dover
DOV
$27.2B
| $7.74M | ﹤0.01% |
43,700
+39,500
| +940% | +$6.36M |
|
1291
PUT
Toast
TOST
$16.8B
| $7.74M | ﹤0.01% |
310,700
-131,300
| -30% | -$2.72M |
|
1292
CALL
Ecolab
ECL
$75.6B
| $7.74M | ﹤0.01% |
33,500
+20,100
| +150% | +$4.26M |
|
1293
PUT
QuantumScape Corp
QS
$3B
| $7.71M | ﹤0.01% |
1,226,100
+772,600
| +170% | +$5.2M |
|
|
PR
1294
CALL
Permian Resources
PR
$17.9B
| $7.71M | ﹤0.01% |
436,400
-119,600
| -22% | -$1.75M |
|
1295
PUT
State Street
STT
$50.9B
| $7.7M | ﹤0.01% |
99,600
-18,100
| -15% | -$1.34M |
|
1296
CALL
Consolidated Edison
ED
$41.6B
| $7.65M | ﹤0.01% |
84,200
+30,900
| +58% | +$2.77M |
|
1297
CALL
Unilever
UL
$131B
| $7.63M | ﹤0.01% |
135,200
-55,111
| -29% | -$3.05M |
|
|
GRFS
1298
CALL
Grifois
GRFS
$5.16B
| $7.63M | ﹤0.01% |
1,142,400
+1,140,900
| +76,060% | +$8.91M |
|
1299
CALL
KBR
KBR
$4.68B
| $7.61M | ﹤0.01% |
119,600
+86,600
| +262% | +$4.93M |
|
|
ARCH
1300
CALL
DELISTED
Arch Resources, Inc.
ARCH
| $7.59M | ﹤0.01% |
47,200
+31,900
| +208% | +$5.45M |
|
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.