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 | |
|---|---|---|---|---|---|---|
276
CALL
Cloudflare
NET
$95.5B
| $64.8M | 0.04% |
669,000
+9,800
| +1% | +$887K |
|
277
PUT
Texas Instruments
TXN
$268B
| $64.7M | 0.04% |
475,500
-11,300
| -2% | -$1.88M |
|
278
CALL
Lowe's Companies
LOW
$115B
| $64.4M | 0.04% |
252,900
+61,800
| +32% | +$14.2M |
|
279
CALL
Capital One
COF
$124B
| $63.8M | 0.04% |
428,400
+60,800
| +17% | +$8.23M |
|
280
PUT
EOG Resources
EOG
$76.7B
| $63.6M | 0.04% |
497,200
+201,500
| +68% | +$23.5M |
|
281
CALL
Accenture
ACN
$85.7B
| $63.4M | 0.04% |
182,800
+37,500
| +26% | +$13.7M |
|
282
PUT
Affirm
AFRM
$24.8B
| $63.3M | 0.04% |
1,699,500
-158,800
| -9% | -$6.34M |
|
283
CALL
T-Mobile US
TMUS
$207B
| $63.2M | 0.04% |
387,300
-120,400
| -24% | -$19.6M |
|
284
PUT
DoorDash
DASH
$77.4B
| $63M | 0.04% |
457,200
-252,100
| -36% | -$29.7M |
|
285
PUT
Comcast
CMCSA
$84B
| $62.7M | 0.04% |
1,446,800
+575,100
| +66% | +$24.8M |
|
286
CALL
Estee Lauder
EL
$29.9B
| $62.6M | 0.04% |
406,400
+26,600
| +7% | +$3.77M |
|
287
PUT
Marathon Digital Holdings
MARA
$4.73B
| $61.8M | 0.04% |
2,736,000
-776,300
| -22% | -$17M |
|
288
CALL
American Airlines Group
AAL
$9.78B
| $61.6M | 0.04% |
4,010,700
+1,085,700
| +37% | +$15.8M |
|
289
CALL
MongoDB
MDB
$24.5B
| $61.4M | 0.04% |
171,300
-4,400
| -3% | -$1.8M |
|
290
CALL
Enphase Energy
ENPH
$5.22B
| $61.3M | 0.04% |
507,000
-331,000
| -39% | -$38.6M |
|
291
CALL
American Electric Power
AEP
$72.4B
| $61.3M | 0.04% |
712,300
+151,600
| +27% | +$12.3M |
|
292
PUT
Bristol-Myers Squibb
BMY
$124B
| $61M | 0.04% |
1,124,200
+246,900
| +28% | +$12.6M |
|
293
PUT
Deere & Co
DE
$164B
| $60.9M | 0.04% |
148,300
-20,000
| -12% | -$7.67M |
|
294
CALL
Colgate-Palmolive
CL
$73.3B
| $60.5M | 0.04% |
672,300
+49,600
| +8% | +$4.2M |
|
295
PUT
Wynn Resorts
WYNN
$9.79B
| $60.5M | 0.04% |
592,200
+1,800
| +0.3% | +$179K |
|
|
296
PUT
Estee Lauder
EL
$29.9B
| $60.5M | 0.04% |
392,600
+69,200
| +21% | +$9.82M |
|
297
PUT
Zscaler
ZS
$23B
| $60.2M | 0.03% |
312,500
+19,800
| +7% | +$4.43M |
|
|
298
Intel
INTC
$516B
| $60.2M | 0.03% |
+1,362,068
| New | +$60.7M |
|
299
CALL
Ford
F
$57.5B
| $59.7M | 0.03% |
4,496,600
-155,700
| -3% | -$1.89M |
|
300
CALL
Blackstone
BX
$150B
| $59.2M | 0.03% |
450,800
-88,200
| -16% | -$11M |
|
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.