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 | |
|---|---|---|---|---|---|---|
401
PUT
Trump Media & Technology Group
DJT
$2.56B
| $39.8M | 0.02% |
641,600
+352,300
| +122% | +$13.7M |
|
402
CALL
Simon Property Group
SPG
$73.4B
| $39.3M | 0.02% |
251,100
+82,700
| +49% | +$12.1M |
|
403
PUT
Floor & Decor
FND
$5.86B
| $39.2M | 0.02% |
302,400
+52,400
| +21% | +$5.95M |
|
404
PUT
Halliburton
HAL
$27.6B
| $39.1M | 0.02% |
993,100
+44,800
| +5% | +$1.6M |
|
405
CALL
e.l.f. Beauty
ELF
$4.66B
| $39M | 0.02% |
199,100
+46,500
| +30% | +$8.26M |
|
406
CALL
Workday
WDAY
$32.7B
| $39M | 0.02% |
157,500
-20,700
| -12% | -$5.89M |
|
407
CALL
Kraft Heinz
KHC
$30.8B
| $39M | 0.02% |
1,056,300
+16,700
| +2% | +$607K |
|
408
CALL
Wayfair
W
$11.1B
| $38.9M | 0.02% |
573,300
-140,800
| -20% | -$7.96M |
|
409
CALL
Phillips 66
PSX
$84.8B
| $38.5M | 0.02% |
235,800
-191,400
| -45% | -$27.6M |
|
410
PUT
Advance Auto Parts
AAP
$3.35B
| $38.5M | 0.02% |
452,200
+5,500
| +1% | +$380K |
|
|
DOCU
411
CALL
DocuSign
DOCU
$9.14B
| $38.4M | 0.02% |
645,500
-174,800
| -21% | -$9.87M |
|
412
CALL
Charter Communications
CHTR
$15.9B
| $38.4M | 0.02% |
132,200
-34,000
| -20% | -$10.9M |
|
413
CALL
Scorpio Tankers
STNG
$3.9B
| $38.3M | 0.02% |
535,000
-129,000
| -19% | -$8.74M |
|
414
CALL
TJX Companies
TJX
$172B
| $38.2M | 0.02% |
376,800
+60,000
| +19% | +$5.82M |
|
415
PUT
Abercrombie & Fitch
ANF
$4.27B
| $38M | 0.02% |
303,200
+96,700
| +47% | +$11M |
|
|
416
Alphabet (Google) Class C
GOOG
$4.17T
| $37.8M | 0.02% |
+248,304
| New | +$35.8M |
|
417
PUT
XPO
XPO
$25.1B
| $37.8M | 0.02% |
309,800
+43,400
| +16% | +$4.65M |
|
418
CALL
On Holding
ONON
$12.2B
| $37.7M | 0.02% |
1,065,400
+349,300
| +49% | +$10.7M |
|
419
PUT
Norwegian Cruise Line
NCLH
$8.87B
| $37.3M | 0.02% |
1,782,800
-998,300
| -36% | -$18.2M |
|
420
PUT
United States Oil Fund
USO
$2.36B
| $37.2M | 0.02% |
473,100
+62,300
| +15% | +$4.5M |
|
421
CALL
ON Semiconductor
ON
$35.9B
| $37.2M | 0.02% |
506,200
+42,900
| +9% | +$3.28M |
|
422
CALL
Thermo Fisher Scientific
TMO
$196B
| $37.1M | 0.02% |
63,800
-74,100
| -54% | -$41.6M |
|
423
PUT
NextEra Energy
NEE
$186B
| $37M | 0.02% |
578,700
-582,900
| -50% | -$34.1M |
|
424
GE Aerospace
GE
$354B
| $36.9M | 0.02% |
+263,351
| New | +$31M |
|
425
CALL
Philip Morris
PM
$303B
| $36.8M | 0.02% |
402,000
+5,900
| +1% | +$544K |
|
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.